<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>

  <link rel="stylesheet" href="./index.css">
  <style>
    div {

    }
  </style>
</head>

<body>
  <div>1</div>
</body>

</html>